Departments of Transportation across the United States are always exploring new ways of improving traction to enhance wet-weather safety while trying to contain rising costs – and longitudinal diamond grooving is one way to do it, according to a nonprofit trade group.

The group, the International Grooving and Grinding Association (IGGA), says longitudinal diamond grooving is proving itself as one strategy in localized areas where wet-pavement crashes have historically been a problem. That includes along curves and at intersections, for example.

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